參數(shù)資料
型號： AD1981BJST-REEL
廠商： Analog Devices Inc
文件頁數(shù)： 7/32頁
文件大?。?/td> 0K
描述： IC CODEC STEREO MICPREAMP 48LQFP
標準包裝： 1
系列： SoundMAX®
類型： 音頻編解碼器 '97
數(shù)據(jù)接口： 串行
分辨率（位）： 16，20 b
ADC / DAC 數(shù)量： 4 / 2
三角積分調(diào)變： 無
動態(tài)范圍，標準 ADC / DAC (db)： 85 / 90
電壓 - 電源，模擬： 4.5 V ~ 5.5 V
電壓 - 電源，數(shù)字： 3 V ~ 3.47 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應商設備封裝： 48-LQFP（7x7）
包裝： 標準包裝
其它名稱： AD1981BJSTREELDKR
AD1981B
Rev. C | Page 15 of 32
MONO VOLUME REGISTER
Index 0x06
This register controls the mono output volume and mute bit. The volume register contains five bits, generating 32 volume levels with
31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility, whenever the D5 bit is set to 1, their
respective lower five volume bits are automatically set to 1 by the codec logic. On readback, all lower five bits read 1s whenever this bit is
set to 1. Refer to Table 14 for examples.
Reg No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0x06
Mono Volume
MVM
X
MV4
MV3
MV2
MV1
MV0
0x8000
All registers are not shown, and bits containing an X are assumed to be reserved.
Table 13.
Bit
Mnemonic
Function
MV [4:0]
Mono Volume Control
The least significant bit represents 1.5 dB. This register controls the output from 0 dB to a maximum
attenuation of 46.5 dB.
MVM
Mono Volume Mute
When this bit is set to 1, the channel is muted.
Table 14. Volume Settings for Mono
Control Bits D [4:0] for Mono (0x06)
D15
Write
Readback
Function
0
0000
0 0000
0 dB Gain
0
0 1111
22.5 dB Gain
0
1 1111
46.5 dB Gain
1
X XXXX
∞ dB Gain, Muted
An X is a wild card and has no effect on the value.
PHONE VOLUME REGISTER
Index 0x0C
Reg No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0x0C
Phone Volume
PHM
X
PHV4
PHV3
PHV2
PHV1
PHV0
0x8008
All registers are not shown, and bits containing an X are assumed to be reserved. Refer to Table 17 for examples.
Table 15.
Bit
Mnemonic
Function
PHV [4:0]
Phone Volume
Allows setting the phone volume attenuator in 32 volume levels with 31 steps of 1.5 dB each. The
LSB represents 1.5 dB, and the gain range is +12 dB to 34.5 dB. The default value is 0 dB, with the
mute bit enabled.
PHM
Phone Mute
When this bit is set to 1, the phone channel is muted.
All registers are not shown, and bits containing an X are assumed to be reserved. Refer to Table 17 for examples.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD1981BJSTZ 制造商:Analog Devices 功能描述:IC AUDIO CODEC
AD1981BJSTZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:AC 97 SoundMAX Codec
AD1981BJSTZ2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX Codec
AD1981BJSTZ-REEL 制造商:Analog Devices 功能描述:Audio Codec 4ADC / 2DAC 20-Bit 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:AC'97 SOUNDMAX CODEC W/STEREO MIC PREAMP - Tape and Reel 制造商:Analog Devices 功能描述:IC AUDIO CODEC
AD1981BJSTZ-REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX Codec
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